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dc.contributor.authorSingh, Gurpreet
dc.contributor.authorTapia-Ruiz, Nuria
dc.contributor.authorLopez Del Amo, Juan Miguel
dc.contributor.authorMaitra, Urmimala
dc.contributor.authorSomerville, James W.
dc.contributor.authorArmstrong, A. Robert
dc.contributor.authorMartinez de Ilarduya, Jaione
dc.contributor.authorRojo, Teófilo
dc.contributor.authorBruce, Peter G.
dc.identifier.citationSingh , G , Tapia-Ruiz , N , Lopez Del Amo , J M , Maitra , U , Somerville , J W , Armstrong , A R , Martinez de Ilarduya , J , Rojo , T & Bruce , P G 2016 , ' High voltage Mg-doped Na 0.67 Ni 0.3-x Mg x Mn 0.7 O 2 (x = 0.05, 0.1) Na-ion cathodes with enhanced stability and rate capability ' , Chemistry of Materials , vol. 28 , no. 14 , pp. 5087-5094 .
dc.identifier.otherPURE: 245029337
dc.identifier.otherPURE UUID: 4b09dd54-b101-4250-ab66-5e863b240bb3
dc.identifier.otherScopus: 84979889703
dc.identifier.otherORCID: /0000-0003-1937-0936/work/28123627
dc.identifier.otherWOS: 000380576700026
dc.descriptionAt CIC Energigune this work was financially supported by LINABATT project from Ministerio de Economía Competitividad (ENE2013-44330-R). P.G.B. (University of Oxford) is indebted to the Engineering and Physical Sciences Research Council, including the SUPERGEN program, for financial support.en
dc.description.abstractMagnesium substituted P2-structure Na0.67Ni0.3Mn0.7O2 materials have been prepared by a facile solid-state method and investigated as cathodes in sodium-ion batteries. The Mg-doped materials described here were characterized by X-ray diffraction (XRD), 23Na solid-state nuclear magnetic resonance (SS-NMR), and scanning electron microscopy (SEM). The electrochemical performance of the samples was tested in half cells vs Na metal at room temperature. The Mg-doped materials operate at a high average voltage of ca. 3.3 V vs Na/Na+ delivering specific capacities of ∼120 mAh g-1, which remain stable up to 50 cycles. Mg doping suppresses the well-known P2-O2 phase transition observed in the undoped composition by stabilizing the reversible OP4 phase during charging (during Na removal). GITT measurements showed that the Na-ion mobility is improved by 2 orders of magnitude with respect to the parent P2-Na0.67Ni0.3Mn0.7O2 material. The fast Na-ion mobility may be the cause of the enhanced rate performance.
dc.relation.ispartofChemistry of Materialsen
dc.rightsThis is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.en
dc.subjectQD Chemistryen
dc.subjectMaterials Chemistryen
dc.subjectChemical Engineering(all)en
dc.titleHigh voltage Mg-doped Na0.67Ni0.3-xMgxMn0.7O2 (x = 0.05, 0.1) Na-ion cathodes with enhanced stability and rate capabilityen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Chemistryen
dc.description.statusPeer revieweden

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